Piston for a bottle



FIG. 1 is a top perspective view of the piston for a bottle, showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a rear side view thereof;

FIG. 6 is a top side thereof; and,

FIG. 7 is a bottom side view thereof.

The broken lines are shown for the purpose of illustrating parts of the article as well as the boundaries of the claim. None of the broken lines form part of the claimed design. 

CLAIM I claim the ornamental design for a piston for a bottle, as shown and described. 